XML DOM – objekt dokumentu
Objekt Document představuje celý dokument XML.
Objekt dokumentu XML
Objekt Document je kořenem stromu dokumentů XML a poskytuje nám primární přístup k datům dokumentu.
Protože uzly prvků, textové uzly, komentáře, instrukce pro zpracování atd. nemohou existovat mimo dokument, obsahuje objekt Document také metody k vytvoření těchto objektů. Objekty Node mají vlastnost ownerDocument, která je přidružuje k dokumentu, kde byly vytvořeny.
Vlastnosti objektu dokumentu
| Property | Description |
|---|---|
| childNodes | Returns a NodeList of child nodes for the document |
| doctype | Returns the Document Type Declaration associated with the document |
| documentElement | Returns the root node of the document |
| documentURI | Sets or returns the location of the document |
| domConfig | Returns the configuration used when normalizeDocument() is invoked |
| firstChild | Returns the first child node of the document |
| implementation | Returns the DOMImplementation object that handles this document |
| inputEncoding | Returns the encoding used for the document (when parsing) |
| lastChild | Returns the last child node of the document |
| nodeName | Returns the name of a node (depending on its type) |
| nodeType | Returns the node type of a node |
| nodeValue | Sets or returns the value of a node (depending on its type) |
| xmlEncoding | Returns the XML encoding of the document |
| xmlStandalone | Sets or returns whether the document is standalone |
| xmlVersion | Sets or returns the XML version of the document |
Metody objektu dokumentu
| Method | Description |
|---|---|
| adoptNode(sourcenode) | Adopts a node from another document to this document, and returns the adopted node |
| createAttribute(name) | Creates an attribute node with the specified name, and returns the new Attr object |
| createAttributeNS(uri,name) | Creates an attribute node with the specified name and namespace, and returns the new Attr object |
| createCDATASection() | Creates a CDATA section node |
| createComment() | Creates a comment node |
| createDocumentFragment() | Creates an empty DocumentFragment object, and returns it |
| createElement() | Creates an element node |
| createElementNS() | Creates an element node with a specified namespace |
| createEntityReference(name) | Creates an EntityReference object, and returns it |
| createProcessingInstruction(target,data) | Creates a ProcessingInstruction object, and returns it |
| createTextNode() | Creates a text node |
| getElementById(id) | Returns the element that has an ID attribute with the given value. If no such element exists, it returns null |
| getElementsByTagName() | Returns a NodeList of all elements with a specified name |
| getElementsByTagNameNS() | Returns a NodeList of all elements with a specified name and namespace |
| importNode(nodetoimport,deep) | Imports a node from another document to this document. This method creates a new copy of the source node. If the deep parameter is set to true, it imports all children of the specified node. If set to false, it imports only the node itself. This method returns the imported node |
| normalizeDocument() | |
| renameNode() | Renames an element or attribute node |
Vlastnosti objektu DocumentType
Každý dokument má atribut DOCTYPE, jehož hodnota je buď null, nebo objekt DocumentType.
Objekt DocumentType poskytuje rozhraní pro entity definované pro dokument XML.
| Property | Description |
|---|---|
| name | Returns the name of the DTD |
| publicId | Returns the public identifier of the DTD |
| systemId | Returns the system identifier of the external DTD |
Metody objektu implementace dokumentu
Objekt DOMImplementation provádí operace, které jsou nezávislé na jakékoli konkrétní instanci modelu objektu dokumentu.
| Method | Description |
|---|---|
| createDocument(nsURI, name, doctype) | Creates a new DOM Document object of the specified doctype |
| createDocumentType(name, pubId, systemId) | Creates an empty DocumentType node |
| getFeature(feature, version) | Returns an object which implements the APIs of the specified feature and version, if the is any |
| hasFeature(feature, version) | Checks whether the DOM implementation implements a specific feature and version |
Vlastnosti objektu ProcessingInstruction
Objekt ProcessingInstruction představuje instrukci zpracování.
Instrukce pro zpracování se používá jako způsob, jak zachovat informace specifické pro procesor v textu dokumentu XML.
| Property | Description |
|---|---|
| data | Sets or returns the content of this processing instruction |
| target | Returns the target of this processing instruction |